Question

physics, can you help me solve part b please ?
https://www.dropbox.com/s/wo2vxelhb93nwl3/Screenshot%202015-12-21%2015.53.52.png?dl=0

Answer 1

u need help

Answer 2

yes

Answer 3

where is the question

Answer 4

can u copy

Answer 5

work out the energy lost to friction over diatance L

in this scenario, the work done by friction over distance s is:
\(W = F s = \mu mg s\)

Answer 6

of course, assume "initial" KE of the thing equals the elastic potential energy of the spring....

Answer 7

I got v = 0.43 , is it correct ?

Answer 8

http://www.wolframalpha.com/input/?i=sqrt+%7B%282%2F0.6%29%5B%281%2F2%29%2815000%29%280.08%5E2%29-%280.42%29%280.6%29%289.8%29%284.5%29%5D++%7D

Answer 9

so the answer for a) would have been this:
http://www.wolframalpha.com/input/?i=%281%2F2%29%2815000%29%280.08%5E2%29

forgive any data entry issues, you should however be able to follow the flow and spot them :-))